There were a couple - if you rewatch the originals you can see a few scenes that jar a little, like the Falcon leaving Mos Eisley, which is nothing more than a light blob moving in a very odd way in the original. I have a little sympathy here, it's clear what the original intention was but the technology wasn't up to the job at the time.
For the rest, every time a comedy alien punches another my hackles raise.
Biting the hand that feeds IT
